Observation of Kondo lattice and Kondo-enhanced anomalous Hall effect in an itinerant ferromagnet

Cheng, Zi-Jia; Huang, Yuqing; Zheng, Pengyu; Chen, Lei; Cochran, Tyler A.; Hu, Haoyu; Yin, Jiaxin; Yáng, Xiàn; Hossain, Md. Shafayat; Zhang, Qi; Belopolski, Ilya; Li, Rui; Cheng, Guangming; Hashimoto, Makoto; Lü, Donghui; Xu, Xitong; Zhou, Huibin; Ma, Wing-Kin; Chang, Guoqing; Yao, Nan; Yin, Zhouping; Hasan, M. Zahid; Song, Jia

doi:10.48550/arxiv.2302.12113

Cited by 1 publication

(2 citation statements)

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“…6, which is in good agreement with the ARPES results. [38] The bands mainly from Co-3d contribution intersect with each other and form nodes around the Fermi level. Due to the large Fermi velocity of the delectron bands, the corresponding Berry curvature is small, and the positive and negative contributions of them mostly offset each other.…”

Section: Analysis and Discussionmentioning

confidence: 99%

“…[34][35][36][37] CeCo 2 As 2 is an FM Kondo lattice which exhibits a significantly enhanced intrinsic AHE. [38] When the R atom is neodymium which bears well-defined local moment of the 4f 3 electronic configuration, NdCo 2 As 2 manifests an FIM state in which the magnetic moments of the Co sublattice are anti-parallel to that of the Nd sub-lattice. [33][34][35] Previous magnetization measurement on the polycrystalline sample of NdCo 2 As 2 demonstrated signatures of magnetic compensation and MMTs.…”

Section: Introductionmentioning

confidence: 99%

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Anomalous Hall effect in ferromagnetic LaCo₂As₂ and ferrimagnetic NdCo₂As₂

Huang

Zheng

et al. 2023

Chinese Phys. B

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We conducted a comparative study of the magnetic and transport properties of single-crystalline LaCo2As2 and NdCo2As2. LaCo2As2 is a soft metallic ferromagnet which exhibits purely intrinsic anomalous Hall effect (AHE) due to Co-3d electrons. With Nd-4f electronic magnetism, ferrimagnetic NdCo2As2 manifests pronounced sign reversal and multiple hysteresis loops in temperature and field dependent magnetization, Hall resistivity and magnetoresistance, due to complicated magnetic structural changes. We reveal that the AHE for NdCo2As2 is stemming from the Co sub-lattice and deduce its phase diagram which includes magnetic compensation and two meta-magnetic phase transitions. The sensitivity of the Hall effect on the details of the magnetic structures in ferrimagnetic NdCo2As2 provides a unique opportunity to explore the magnetic interaction between 4f and 3d electrons and its impact on the electronic structure.

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Section: Analysis and Discussionmentioning

confidence: 99%